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Finding the Fourth Proportional to 20,959.73, 31,432.90 and 6,917.14

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Solution

The fourth proportional to 20,959.73, 31,432.90 and 6,917.14 is: 10,373.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,959.73 : 31,432.90 = 6,917.14 : x
  2. Step 2: Convert to fraction form
    20,959.73/31,432.90 = 6,917.14/x
  3. Step 3: Cross multiply
    20,959.73x = 31,432.90 × 6,917.14
  4. Step 4: Simplify right side
    20,959.73x = 217,425,769.91
  5. Step 5: Solve for x
    x = 217,425,769.91/20,959.73
  6. Step 6: Final answer
    x = 10,373.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.